Great place to stay! Walking distance to just about everything. The house is in the heart of the old town. Its quiet from major tourists but still walking distance to all the major attractions in Bangkok. Its roughly 10 minutes to Hua Lumphong train station on a tuk-tuk, from there you can pick up MRT lines and connect to BTS line. It's minutes from Kao-San road or major ferries or boat tours.
If you have some free morning, try having breakfast at Mongkol's, gotta have the pound cake with his coffee.
We stayed with Mongkol for just a week, but the place had already felt like home.